Boy Name · Irish Origin
Oneil
Last reviewed: June 2026
Oneil — a boy name from the Irish tradition — is an uncommon, standout choice. Its meaning, "Descendant of Niall", anchors the name in something deeper than sound alone. If Oneal is on your shortlist, Oneil belongs in the same conversation.
Names like Oneil
- Oneal — meaning, origin and popularity
- Onalee — meaning, origin and popularity
- Onnie — meaning, origin and popularity
- Orvil — meaning, origin and popularity
- Ona — meaning, origin and popularity
- Onyx — meaning, origin and popularity
- Ontario — meaning, origin and popularity
- Onesimo — meaning, origin and popularity
Explore related collections
Frequently asked about Oneil
What does the name Oneil mean?
Oneil means "Descendant of Niall" and is of Irish origin.
What is the origin of Oneil?
Oneil originates in Irish naming tradition. Names of Irish origin often share recognizable sounds and cultural roots that shape how the name reads today.
How do you pronounce Oneil?
Oneil has 5 letters and is most commonly stressed on the first syllable. Tap the pronunciation player on this page to hear it spoken aloud.
Is Oneil a boy's or girl's name?
Oneil is primarily used as a boy's name in US records, though usage can vary by region and era.
How popular is Oneil in 2026?
In our 2026 popularity tracker, Oneil sits in the Rare tier — an uncommon, standout choice.
What names are similar to Oneil?
Names that share Oneil's sound and style include Oneal, Onalee, Onnie, Orvil, Ona. Open the "Names like Oneil" rail on this page for the full list.